Comparison

QR Code Reader vs CatAuth

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

QR Code Reader

Instantly scan QR codes and barcodes with a high-performance reader that launches immediately. Generate custom QR codes for various data types and save scan history locally. Supports front camera and flashlight for convenience.

Highlights
  • Instant scan on launch
  • Scan from photos
  • QR code generator
  • Automatic history save
  • Front camera support
  • Flashlight toggle
Features
Read full description

QR Code Reader — The Fastest Way to Scan, Create, and Save. This is a simple and high-performance QR code reader designed to launch and scan in an instant. The camera activates the moment you tap the icon, recognizing QR codes and most barcodes immediately. This app comes with no account registration, no subscription, and no sign-up required. Scan results are stored only on your device — never uploaded to our servers. Features ---------------- ■ Instant Scan on Launch The camera activates the moment you open the app. High-speed recognition means you'll never miss a code again. ■ Scan from Photos Pick a QR code image from your gallery and we'll read it instantly. Perfect for screenshots of tickets, invitations, and promo codes. ■ Front Camera Support Switch between front and rear cameras with one tap. Useful for scanning codes shown on your own screen. ■ Flashlight Support Built-in flashlight toggle for dim restaurants, evening events, or any low-light environment. ■ QR Code Generator Create your own QR codes in multiple formats — URLs, Wi-Fi credentials, plain text, contact cards, and more. Customize and share in seconds. ■ History & Auto-Save Every scan is saved automatically so you can revisit results later. No more rescanning the same code twice. ■ Dark Mode Support Automatically adapts to your system appearance. Easy on the eyes when scanning codes at night or in dim environments. Recommended for ---------------- ■ Anyone who finds existing QR apps too slow ■ People who scan menus, tickets, or Wi-Fi codes daily ■ Users who don't want to sign up just to scan a code ■ Small business owners creating QR codes for promotions --- QR Code is a registered trademark of DENSO WAVE INCORPORATED in Japan and in other countries.

About

CatAuth

Features
Read full description

Protect your online accounts with CatAuth, a simple and reliable two-factor authenticator for OTP and TOTP verification codes. FAST TWO-FACTOR AUTHENTICATION CatAuth generates time-based one-time passwords directly on your device. Use them as an additional verification step when signing in to services that support TOTP authentication. QUICK AND EASY SETUP Scan a QR code or enter a setup key manually. CatAuth starts generating verification codes in seconds and keeps your accounts organized in one convenient place. KEY FEATURES • Generate current OTP and TOTP verification codes • Add accounts by scanning a QR code • Enter setup keys manually • Generate codes without an internet connection • Back up and restore your authenticator accounts • Manage multiple accounts in one place • View clear countdowns before codes refresh • Copy verification codes quickly WORKS OFFLINE Your TOTP codes are generated directly on your device using the account secret and current device time. No internet connection is required to view an up-to-date code after an account has been added. BACKUP AND RESTORE Create a backup of your authenticator accounts and restore them when needed. Keep access to your saved accounts when moving to another device or reinstalling the app. BROAD COMPATIBILITY CatAuth works with websites and services that support standard TOTP authentication, including email providers, social networks, cloud tools, developer platforms, financial services, and more. Make every sign-in safer and simpler with CatAuth. End of trial and renewal of subscription: - Once your purchase is confirmed, payment will be debited from your iTunes account; - The subscription will automatically renew unless the auto-renewal feature is turned off at least 24 hours before the end of the current period; - Subscription renewal fees are debited from your account within 24 hours before the end of the current period; - The user can manage subscriptions. Auto-renewal can be turned off after purchase in your iTunes Account Settings page; - It is not possible to cancel an existing subscription before its expiration date. Privacy Policy: https://cat2fauth.com/privacy-policy/ Terms of Use: https://cat2fauth.com/terms-of-use/

Screenshots

QR Code Reader4 screens
CatAuth4 screens

Verdict

The call

The clearest difference is in-app purchases: QR Code Reader at none against CatAuth's 3. QR Code Reader also leads on update cadence (weekly vs every 2 weeks) and iOS requirement (13.0 vs 15.6). CatAuth's advantage is ads (none vs shown). On price and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. CatAuth sells 3 in-app purchases, starting at $6.99 per 7 days. QR Code Reader asks for nothing beyond the download.

UpkeepUpdate frequency

QR Code Reader ships an update weekly, CatAuth every 2 weeks. The most recent releases landed on September 29, 2026 and September 21, 2026 respectively.

Scorecard4 real differences · 5 level
QR Code Reader versus CatAuth: the parameters behind the verdict, then further details
ParameterQR Code ReaderCatAuth
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyWeekly — betterEvery 2 weeks
AdsYesNo — better
In-app purchasesNo — betterYes
MonetizationAd-supported—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.0 — better15.6
Further details — not scored
Size45 MB46 MB
Age rating4+4+
DeveloperKouichi YamaguchiRICHYARD GEIMS, TOO

In-app purchases

None

QR Code Reader

No in-app purchases

3 purchases

CatAuth

Subscriptions3
  • Premium Weekly$6.997 Days
  • Premium Weekly Trial3 Days trial$6.997 Days
  • Premium Yearly$29.991 Year

Questions

Is QR Code Reader free?
QR Code Reader is free to download, with no in-app purchases.
Is CatAuth free?
CatAuth is free to download, with in-app purchases available.
Do QR Code Reader or CatAuth have ads?
QR Code Reader shows ads; CatAuth does not.
Which is updated more often, QR Code Reader or CatAuth?
QR Code Reader ships an update weekly, and CatAuth every 2 weeks. Most recently, QR Code Reader was updated on September 29, 2026 and CatAuth on September 21, 2026.

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